<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>hi all,<br data-mce-bogus="1"></div><div>I did vc-relax for a tetragonal crystal structure, after diong it, structure convert to orthorhombic. do it is correct?<br data-mce-bogus="1"></div><div>i expect stucture be tetragonal after vcrelax.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>phd student,damghan university,iran<br data-mce-bogus="1"></div><div>sabike ghasemi<br data-mce-bogus="1"></div></div></body></html>